Door-lock.



W. W. FESSLER.

DOOR LOCK.

APPLICATION FILED MAB. 2B, 1906.

PATENTED FEB. 5, 1907.

7? W/TN SSES INI/EN TOI? A rra/vers WALTER W. FESSLER, OF NEW YORK, N.Y.

DOOR-LOCK.

Specification of Letters Patent.

Patented Feb. 5, 1907.

Application filed March 28,1906. Serial No. 308,405.

To all whom it may concern:

Beit known that I, WALTER W. FEssLER,

. a citizen of the United States, and residing at New York, in thecounty of New York and State of New York, have invented certain new anduseful Improvements in Door- Locks, of which the following is aspecification, such as will enable those skilled in the art to which' itappertains to make and use the same.

This invention relates to door-locks; and the object thereof is toprovide animproved device of this class which is simple in constructionand operation and composed of but few parts and which when in operationcannot be picked or forced by tlie insertion of a tool or instrumentbetween the door and door-frame or by cutting away a part of thedoor-frame in order to insert a tool or instrument for the purpose ofoperating the lock so as to open the door.

This invention is an improvement on that described and claimed in UnitedStates Letters Patent granted to me March 13, 1906, No. 815,009, and isfully disclosed in the following specification, of which theaccompanying` drawin s form a part, in which tle separate parts o myimprovement are designated by suitable reference characters in each ofthe views, and in which- Figure 1 is afront view of my improved lock andshowing the front plate of the separate parts thereof removed and alsoshowing the parts of lock in inoperative position; Fig. 1

2, a similar view showing the parts of tlc lock in operative position;Fig. 3, a transverse section on the line 3 3 lof Fiv. 1 and showing thelock secured to a doorfFig. 4, a view similar to Fig. 3, but showing amodification; and Fig. 5, an inside view of one of tle lock-operatingdevices which is secured to the inner side of the lock or to the innerside of the door.

In the practice of my invention I provide a casing a, adapted to besecured in or to a door 1n the usual manner, and a keeper b, adapted tobe secured in or to a door-frame in the usual manner. The keeper b isprovided with a curved or arc-shaped passage c, which opens through theface of said keeper at or near the top and bottom thereof, as shown atc2 and c3, and said keeper in practice is preferably cast in the desiredform from any suitable metal, and the face thereof is provided with acentral portion c, which separates the openings c2 and c3 of the curvedor arc-shaped passage c. In Figs. 1 and 2 of the drawings the face-plateof the keeper b is removed; but it will be understood that the saidkeeper in practice is provided with a face-plate, especially when thelock or the parts thereof are secured to the inner side of the door anddoor-frame, as shown in Figs. 3 and 4; but when the parts of the lockare secured in the door and in the frame the faceplate of the keeperneed not necessarily be employed.

Pivoted in the inner end of the casing a is a plate d, which ispreferably segmental in l form and provided with a curved arm d2, the

outer edge of the plate d and arm d2 in the form of construction shownbeing formedon the arc of a circle the center of which is the pivotalpoint of the plate d. rPhe pivot of the plate d consists of a pin orsimilar device d3, with which is connected a pinion d4, and.

in practice the pin d3 may be stationary, and the plate d and pinion d4may be secured togetl. er, so as to turn on said pin, or said plate andpinion may be secured to said pin and said pin may be rotatably mounted.y

Mounted centrally and longitudinally of the casing a is a lock-bolt e,the front end of which is narrower than the rear end portion thereof andprovided in the bottom side thereof with teeth e2, which mesh `with theteeth on the pinion d4, and formed in the bottom of the rear end portionof the bolt e is a recess f, the bottom side walls of which are cut awayto form beveled shoulders f 2, and the rear end portion of the bolt e isprovided'with a longitudinal recess c3, in the rear end portion of whichis pivoted a forwardly-directed and vertically-movable dog g, providedat its front end with a transverse head g2, the ends of which extendtransversely through the bolt ein the recess f.

The (pivotal point of the dog gis at g3, and pivote over the rear endportion of the bolt e is an arm h, which extends forwardly and normallyrests on the bolt e and the front end of which is provided with anupwardly and forwardly curved finger h2, having a hook member h, adaptedto enter recesses di andV d in the arm d2, and placed in the casin aover the arm h is a sprin t, which normaly bears on said arm and forcesit outwardly onto the bolt e.

In the form of construction shown in Figs. 1 to 5, inclusive, a drum jis passed throu h the door 7c and screwed into the back of te casing a,and in this drum is a rotatable .cyl-v IOO IIC

of the key i3 the bit 1'4 may be made to operate the bolt e or projectsaid bolt, as shown in Fig. 2, or withdraw said bolt, as shown in Vhenthe bolt eis projected, as shown in Fig. 2, the plate d is turned andthe'arm d2 is forced through the keeper b, as clearly shown in Fig. 2,and when said bolt is withdrawn this operation is reversed, thc plate dis returned to the position shown in Fig. 1, and the arm d2 is alsowithdrawn into the casing a.

In the operation of the cylinder j2 and the bit j* thereof, supposingthe parts to be in the position shown in Fig. 1, the said cylinder isturned to the left. the bit 7'4 strikes the head g2 of the dog g andraises said dog, and this operation raises the arm h and throws thefinger h2 out of engagev ment with the arm d2. As the cylinder jz isturned farther to the left the bit 7'4 strikes the forward beveledshoulder]r2 of the bolt e and moves said bolt forwardly, and thisoperation projects said bolt and turns theplate d and the arm d2 intothe position shown in Fig. 2. In this position of the parts the fingerh2 of the arm h or the hook or nose h3 of said finger gages the recess din the plate d, and the door 1s securely locked. f

In unlocking the door the key ja is inserted and the cylinder 7'2 turnedto the right, and in this operation the bit 7'4 raises the dog g, whichlatter raises the arm h, and the finger h2 of said arm is disengagedfrom the recess d, and as the cylinder i2 is turned farther to the rightthe bit j* strikes the rear beveled shoulder f2 and forces said boltbackwardly, as shown in full lines in Fig. 1-, and the door is unlocked.

The drum y' is held against rotation by a screw js, passed through astud or bearing j", and that part of the lock comprising the drum y',cylinder jz, and key jf is of the ordinary Yale type; but these partsmay be constructed in any desired manner, and in Fig. 4 I have shown amodification in which the drum j .is omitted and an ordinary keym ispassed through a keyhole m2, formed in the door, and the key m isprovided with a bit m3, which takes the place of the bit j, and in thisway the dog g and bolt e may be operated by an ordinary key passedthrough the door.

The inner side of the casing a is provided with an ordinary knob fn,having a shank n, which is passed through the face-plate of said casingand the inner end of which is provided with a plate n3, having bitslz/1, which extend in opposite directions, normally Yforwardly andbackwardly,l and which are held in their normal position by a spring'12.5, and

In this operation by means of knob n the parts of dthe lockmay beoperated from the inner side of the door exactly the same asl from theouter side thereof by means of the cylinder j2 or the key m, the bits n4serving when the knob n is turned in one direction to project thev bolte and in the other direction to withdraw said bolt, said bits operatingin connection vwith the dog g or the head g2 thereof.

When the parts of the lock are in their o erative position, the arm d2extends entire y through the keeper b, the end thereof extending backinto the casing a, and with this con-- .keeper b and forms asupplemental locke-bolt,

the arm d2 and the forward end of the holt e both serving as lockpurposes, and in. this way the lock is made much stronger and moreeffective.

My invention is not limited to any particu lar form of key device foroperating the do g',

the arm h, and the bolt e, and any suita ler device or devices may beemployed for this purpose, and various changes in and modications of theconstruction described may be made without departing from the spirit .of

my invention orsacrificing its advantages.

Having fully described my invention, what I claim as new, and desire toSecure by Letters Patent, is

I. A lock comprising a lock-casing adapted to be secured to or in adoor, and a keeper adapted to be Secured to or in a door-frame, thekeeper being provided with a curved pas sage which opens through theface thereof at two diderent points and the lock-easing heing providedwith a pivoted plate having 8, curved arm adapted to be projectedthrough said keeper and back into said casing, a pin-l ion connectedwith said plate, a bolt mc'ivunt-s ed longitudinally in the lock-casingand provided with teeth operatin with said pinion and adapte to beprojected into said eeper, a pivoted springe ressed arm resting on saidbolt and' adaptl to eilgage said curved arm at two different points,

and a dog pivoted in said bolt and ada ted to raise the spring-depressedarm, said og and said bolt being both adapted to' be operated by a key.

2. A lock comprising a casing adapted to be secured to orin a door, anda keeperadapted to be secured to orin a door-frame, a mein ber pivotedin said casing and provided with a` curved arm adapted to be projectedtlnough said keeper and back into is entirely.v

in connection l IOO said member, a olt mounted longitudinally in apinion connected with said member, a I in the casing and provided withteeth operatbo t mounted longitudinally in the casing l ing inconnection with said pinion and also and provided with teeth operatingin connecl adapted to be projected into said keeper, a tion`With saidpinion and also adapted to be spring-depressed device resting on saidbolt projected into said keeper, a s ring-depressed and adapted toengage said arm at tWo diiierevice resting on said bolt an adapted toenent points, and a dog 'pivoted in said bolt and 0'age said arm at tWodiierent points, and a adapted to raise the spring-depressed device, dogpivoted in said bolt and adapted to raise l said dog and said bolt beingboth adapted to the sprin -depressed device, said dog and i be operatedby a key. said bolt eing both adapted to be operated In testimony that Iclaim the foregoing as by a key. my invention I have signed my name, in

3. A lock comprising a casing adapted to i presence of the subscribingWitnesses, this 3o be secured to orin a door, and a keeper adapt 27 thday of March, 1906. ed to be secured to or in a door-frame, a memiWALTER W FESSLER ber pivoted in said casin and rovided with a curved armadapte to e projected Witnesses: through said kee er, a pinion connectedwith C. J. KLEIN,

F. A. STEWART.

